问答题

镰状细胞贫血是一种单基因遗传病，其遗传方式为？

答案：常染色体隐形遗传

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可有奔头（打一字）

答案：谜底：奇
解析：“奔”字的头部为“大”，与“可”组合，成“奇”字。

单项选择题

The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in _ while that for latter one is _.
A、sufficient quantity / measured
B、measured quantity/sufficient
C、excessive quantity/sufficient
D、the less quantity the better/the more the better