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【单选题】
一头两岁公牛，外生殖器官和基本正常，但不育。如果精液品质检查公牛无精，下一步应做的检查是（）
A.
染色体检查
B.
外生殖器官检查
C.
四肢检查
D.
内分泌检查
E.
睾丸组织学检查
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Once the king of India fell ill and sent for his doctor. The doctor came, examined him and said, "You will be well again in a few days if you take bull’s (公牛的) milk." The king was very surprised, for ...
A.
Because she was forced to do it.
B.
Because she often washed clothes there.
C.
Because she enjoyed washing clothes there.
D.
Because she wanted the king to notice her.