单项选择题

渗透系数为1.0～5.0m／d的含水层岩性最可能为()。

A . 黏土
B . 粉土
C . 中砂
D . 细砂
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The Hundred Years’ war stated in ____ and was ended in ____, in which the English had lost all the territories of France except the French port of ____.
A.1337,
B.1337,
C.1346,
D.1346,
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OptiX2500＋系统有______个板位（插板区）：（）
A.12
B.14
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