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【单选题】
在同样情况下，不重复抽样的抽样平均误差与重复抽样的抽样平均误差相比是（ ）。A.
前者大于后者
B.
前者小于后者
C.
两者相等
D.
两者不等
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反馈参考答案：
举一反三
【简答题】缝纫机的踏板机构是以（）为主动件的（）。
【单选题】I'll get it for you ______ I could remember who last borrowed it.
A.
on condition
B.
as far as
C.
if only
D.
lest
【单选题】I ________ a novel written by Ernest Hemingway last night, and another night I’ll finish it.
A.
read
B.
have read
C.
had read
D.
was reading
【单选题】I’ll never forget such an attractive city ___ I spent many happy hours there with my classmates last summer holidays.
A.
that
B.
where
C.
in which
D.
because
【简答题】薄板冷却器按流程图进行组装，压紧尺寸在规定范围内，不得渗漏，使用前需用（）℃热水冲洗杀菌。
【单选题】I _______ to help you but I was not able to spare any time.I _______ a paper last night and I'll have to finish it today.
A.
wanted; have been writing
B.
have wanted;wrote
C.
had wanted; wrote
D.
had wanted;was writing
【单选题】Woman: Anne says she'll be visiting us on Friday. Man: I suppose that'll be the last we'll see her until she comes back to college in the fall. Question: What time does the conversation probably take ...
A.
At the beginning of the term.
B.
Towards the end of the term.
C.
During the Christmas season.
D.
During the summer vacation.
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