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【单选题】
Only by practicing a lot _____ our English well enough to communicate with foreigners.A.
we can learn
B.
can we learn
C.
learn we
D.
we learn
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反馈参考答案：
举一反三
【简答题】普通黏土砖的尺寸是多少?
【简答题】单纯呼吸性酸中度
【单选题】According to the first paragraph, which of the following statements is not true?
A.
Railroads provided relatively easy access to the west for the first time.
B.
Railroads performed a useful service in extending the frontier and helping to achieve national unity.
C.
There were abuses about building and operating the railroads.
D.
The economy of the west is robust.
【单选题】患者发生了哪一类型的酸碱平衡失调（ ）。
A.
失代偿性呼吸性酸中毒
B.
代偿性呼吸性酸中毒
C.
呼酸合并代谢性酸中毒
D.
代谢性酸中毒
E.
呼酸合并代谢性碱中毒
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