急诊室护士小李为一把长24cm的无菌镊子更换消毒液，液面的高度应为

A、A four-day Holiday

B、The busiest shopping day of the year

C、A day to turn a profit for businessman

D、the beginning of Christmas shopping season

According to the article, what will visitors be able to do at the lake？

A．Swim

B．Fish

C．Water ski

D．Ride boats

me of the year.

A．adding

B．additive

C．additional

D．additionally

What Blackpool's beaches strike visitors most is their

A．emptiness.

B．cleanliness.

C．modernity.

D．monotony.

It is (driving) (on the left) (what) causes visitors to Britain the (most) trouble.

A．driving

B．on the left

C．what

D．most

cypress along the eastern side of the swamp. Whip-poor-wills call; bullfrogs croak; mosquitoes hum. Darkness creeps across the swamp.【71】Offering a different set of treats every season, the refuge attracts a wide variety of visitors during the hunting season, during the fishing season, and during the bird-watching season.【72】Canada geese far outnumber other waterfowl, but snow geese, blue geese, and occasionally white-fronted geese winter there, too. Nearly every variety of duck, diver and puddle, reside in the quiet, smaller sloughs. As a result, the swamp attracts hunters in 'early winter, goose hunters to the pits and duck hunters to the blinds. The hunters' closely regulated success is the result of hundreds of acres of corn left standing by Pose County farmers, who rent the rich bottom land between the lake and the river by sealed bid. The farmers' contract requires them to leave 25% of the harvest as food for the thousands of waterfowl, encouraging them to stay. The encouragement works, much to the hunters' delight.【73】Attracted by the spring crappie run, fishermen haul in hefty stringers of slabs and return to fish for bluegill. Evening campfires turn skillets full of fresh fillets into plates full of succulent morsels. Then sunrise sends the bass fishermen scurrying to secret waters, some to return with empty bags. One fisherman, however, boats three, one weighing in at 8 pounds 2 ounces. Later in the day, a few trotlines yield spoonbill catfish, those prehistoric monsters weighing 30 pounds or more as long as a man is tall. In late afternoon or early evening, a jug fisherman occasionally bags perch, catfish, or even a wily gar, long, slender, and sharp-toothed. Spring moves auto summer, and summer moves into autumn.【74】Boasting none of the amenities of modern campgrounds, Hovey Lake nevertheless attracts 90, 000 visitors a year, visitors who hunt and fish and watch the birds.【75】They hear the owls, the whip-poor-wills, the frogs, even the mosquitoes, and know that in the chain of this uncommon swamp life, every link must stay intact.

A. They come to appreciate the swamp for what it is, a precious ecological system struggling to survive man's intrusion.

B. In spring, however, the fishermen replace the hunters on Hovey Lake waters.

C. Only then, when the lake is closed for waterfowl migration, do the fishermen leave.

D. Because the swamp is situated along the Mississippi flyway, it offers refuge to 40, 000 to 50, 000 waterfowl each winter.

E. Indiana's cypress swamp, protected as a wildlife refuge, greets visitors with night sounds common to the uncommon 1,400-acre environment.

F. The most experienced hunters and fishermen at Hovey Lake, however, are not human.

(71)

It is (driving) (on the left) (what) causes visitors to Britain (the most) trouble.

A．driving

B．on the left

C．what

D．the most