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【单选题】
生产硅酸盐水泥时,必须掺加适量的石膏,其对水泥的作用是( )A.
助磨
B.
促凝
C.
缓凝
D.
增强
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举一反三
【单选题】We should________the lights when we leave our classroom because we must save electricity. [ ]
A.
switch on
B.
switch over
C.
switch off
D.
switch through
【单选题】We should leave to our future generations sufficient ___ for their needs.
A.
source
B.
resources
C.
recovery
D.
coverage
【简答题】descend v. → descent n. → descending a. → descendant n. The path ___1____ steeply into the valley. The plane began to make its final __2____ into the airport. Arrange the numbers in ____3____ order. W...
【单选题】(2014·江西赣州适应性考试)We should try our best to leave our generation a world better than________we were given.
A.
it
B.
one
C.
the one
D.
those
【简答题】英译汉:We should leave the passengers a very good first impression with our sweet simle when they borad the plane.
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