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【判断题】
实验室做固体培养基时;1.5-2.0%的琼脂作凝固剂;做半固体培养基时,琼脂加入量通常是0.5%。A.
正确
B.
错误
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举一反三
【单选题】有如下两个列表: st1 = [(2),(0),(1),(8) ] st2 = [(2,),(0,),(1,),(8,)] 那么,type(list1[0])和type(list2[0])分别是:
A.
int和tuple
B.
int和int
C.
tuple和tuple
D.
tuple和int
【单选题】女26岁,第一胎39周胎头衔接,是指
A.
枕骨进入骨盆入口平面
B.
顶骨进入骨盆入口平面
C.
双顶径进入骨盆入口平面达到或接近坐骨棘平面
D.
双顶径到达坐骨棘平面
E.
双顶径到达坐骨结节平面
【单选题】Which of the following is not one of the points that the heading of a memo should cover?
A.
detailed discussion of the problem
B.
the person who wrote the memo
C.
the time when the memo was written
D.
the person(s) to who the memo has been sent
【单选题】— Can I eat the cake, Mum? — Yes, you can. ______ you must wash your hands first. [ ]
A.
But
B.
So
C.
Or
D.
After
【单选题】You must wash your hands when preparing food, to ______ passing on disease to your family.
A.
fight against
B.
protect against
C.
protest against
D.
guard against
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