由低碱水泥、中碱玻璃纤维和短石棉,加水成型、蒸养而成的纤维增强水泥平板,其主要特点包括()。
A.易变形
B.强度高
C.防潮性较差
D.防火性好
E.加工性能好
A.易变形
B.强度高
C.防潮性较差
D.防火性好
E.加工性能好
第1题
A.move
B.to move
C.moving
D.moved
第2题
Which of the following is mentioned as a result of severe desertification?
A.The shrinking of forest coverage.
B.The lack of water supplies.
C.A quickly decreasing production of crops.
D.A large area of cropland changed into grassland.
第3题
The first (know)area was in India, where diamonds were found thousands of years ago.
第4题
Thousands of years ago people were forced to leave their homeland because ______.
A.the earth was in an ice age
B.they found their homeland getting colder
C.huge sheets of ice were spreading over the land
D.they had to stay near the animals they hunted for food
第5题
A.migrate
B.emigrate
C.immigrate
D.migrant
第6题
第7题
The rebels have become notorious for
A.controlling the diamond - mining area
B.killing thousands of civilians
C.maiming thousands of civilians
D.both B and C
第8题
A.speculate
B.evacuate
C.anticipate
D.manifest
第9题
Thousands of Irish people starved because______.
A.they depended on the potato
B.they were forced to move to America
C.the weather conditions in Ireland were not fit for growing the potato
D.the potato harvest was had
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