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【单选题】
Although buses are scheduled to depart at a certain hour, they are often late.A.
listed
B.
required
C.
obligated
D.
located
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皮皮学刷刷变学霸
举一反三
【单选题】Historians tend to tell the same joke when they are describing history education in America. It's the one【C1】______the teacher standing in the schoolroom door【C2】______goodbye to students for the summ...
A.
in
B.
by
C.
for
D.
about
【单选题】After singing a song, he __ us a joke.
A.
went on telling
B.
went on to tell
C.
went telling
D.
went to tell
【多选题】普鲁卡因青霉素结晶是先将青霉素钾盐溶于缓冲溶液中,冷却至 5 ~ 8 °C ,并加入适量晶种,然后滴加盐酸普鲁卡因溶液,在剧烈搅拌下就能得到普鲁卡因青霉素微粒结晶。采用的是哪些结晶法:
A.
饱和溶液冷却
B.
盐析沉淀结晶
C.
反应沉淀
D.
等电点结晶
【简答题】v. 抢占,抢先;抓住,攫取 g_____
【简答题】Tell a joke at the beginning to relax the atmosphere. _________
【单选题】Historians tend to tell the same joke when they are describing history education in America. It's the one【B1】the teacher standing in the schoolroom door【B2】goodbye to students for the summer and calli...
A.
about
B.
in
C.
for
D.
by
【单选题】When Americans tell a joke, they often ______.
A.
pat people on the head
B.
give people a hug
C.
dig people in the ribs
D.
touch people on the arm
【单选题】breach [bri:tF]
A.
n. 违背, 破坏, 破裂, 裂口 vt. 打破, 突破
B.
n. 敲打, 拍子, 巡逻区域 v. 打, 打败
C.
v. 绑, 镶边, 装订, 凝固, 约束
D.
v. 抓住, 攫住 n. 离合器
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