某智力测验的信度r=0.75，某次施测得到分数的标准差为3.00，则该测验的标准误是多少？若某被试得分为100，试估

A．which

B．whose

C．of that

D．that

The tall tree. leaves are darker than those of the other two,is as old as grandpa.

A．which

B．whose

C．of which

D．that

A．a tree

B．such tree

C．an tree

D．tree

Tree leaves ______ in autumn.

A．grow

B．fall

C．turn

No two leaves from the same tree are ________.

A identical

B original

C analytical

D critical

A.The tree was broken.

B.All the leaves fell down.

C.One of the branches fell down.

D.The tree was cut down.

—"How dark your brother's hair is!"—"It's______mine when I was at his age. "

A．no darker than

B．no more darker as

C．not dark more than

D．not darker as

Which of the following statements is tree according to the passage？

A．No more than five passengers were saved.

B．The author was seventy-four years old when he wrote about the accident.

C．All of those passengers who jumped from the sinking ship died in the water.

D．Many of those passengers who threw themselves into the sea got on aboard the boat.

People in ancient Greece understood that______.

A．some tree bark and leaves could be used as aspirin

B．some tree bark and leaves had certain medical effects

C．aspirin was a good pain killer

D．aspirin could cure arthritis