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【单选题】
微生物的发酵产能代谢途径的特点是其底物氧化后的最终电子受体是( )。A.
氧气
B.
无机氧化物
C.
有机物
D.
水
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【单选题】_______ the illegal mobile WAP sites worries many parents. [ ]
A.
The children's surfing
B.
The children surf
C.
The children surfing
D.
The children have surfed
【简答题】听短文，根据其内容选出能完成下列句子的最佳答案。短文读两遍。 1. Many like going to pet show. [ ] A. children B. old men C. s 2. The children like it most when they ride on . [ ] A. an elephant B. a goat C. a cow 3. Th...
【单选题】— How many ______ are there in your class? — About 63. [ ]
A.
childs
B.
childrens
C.
children
D.
child
【单选题】命题p：?x∈R，cosx＞1的否定是（ ）
A.
￢p：?x∈R，cosx≤1
B.
￢p：?x∈R，cosx≤1
C.
￢p：?x∈R，cosx＜1
D.
￢p：?x∈R，cosx＜1
【简答题】阅读理解。 It was Sports Day at School. There were many races. Lots of parents were watching the children. There was a large crowd of people. Some girls were talking about the races. They were talking abou...
【单选题】已知命题p：?x∈R，cosx≤1，则（ ）
A.
￢p：?x∈R，cosx≥1
B.
￢p：?x∈R，cosx＜1
C.
￢p：?x∈R，cosx≤1
D.
￢p：?x∈R，cosx＞1
【单选题】We have too many people in our country. Their life will be ___________ if there are ___________ children in a family.
A.
richer; fewer
B.
poorer; fewer
C.
richer; more
D.
richer; less
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