皮皮学，免费搜题
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【单选题】
人的体细胞和生殖细胞中染色体的数目分别是（ ）A.
23对和23条
B.
23对和23对
C.
23条和23条
D.
22条和23对
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】能产生大量分枝和气生菌丝的放线菌菌落,与培养培养基的结合,往往具有如下特征:
A.
较松，极易挑取；
B.
较松，不易挑取；
C.
较紧，容易挑取；
D.
较紧， 不 易挑取；
【单选题】I don't know ___________or not. A. whether he is at home B. if he is at home C. that he is at home D. whether is he at home
A.
whether he is at home
B.
if he is at home
C.
that he is at home
D.
whether is he at home
【单选题】He is such a humble man that whenever he is praised, he says he is only ____ his duty.
A.
completing
B.
performing
C.
reforming
D.
transforming
【简答题】A．That he wants something to eat. B．That he will tell them. C．That he is not hungry. D．That he is angry.
【简答题】A．He thinks the woman is being unfair. B．He agrees that the workload is heavy. C．He feels the assignment is reasonable. D．He won't be able to go to the lab today.
【单选题】以下2段代码，说法正确的是？shorts1=1;s1=s1+1-------------shorts1=1;s1+=1;
A.
都没有编译错误。
B.
结果是一样的！
C.
第二段代码正确。
D.
都有编译错误。
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