皮皮学，免费搜题
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【单选题】
上课时,未执行考勤制度,未抽点或安排学生干部点名,属几级教学事故?A.
一级教学事故
B.
二级教学事故
C.
三级教学事故
拍照语音搜题，微信中搜索"皮皮学"使用
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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】We have the pleasure to inform you that the shipment has gone _____per s.s"wind" and hope that it will arrive at the destination in _____condition.
A.
on, good
B.
for, complete
C.
forward, perfect
D.
onto, perfect
【简答题】当菌种被其他杂菌污染时或混合菌悬液常用划线法进行纯化（纯种分离）。此法是借助将蘸有混合菌悬液的接种环在平板表面多方向( )划线，使混杂的微生物细胞在平板表面分散，经培养得到分散成由单个微生物细胞繁殖而来的菌落，从而达到纯化的目的。
【单选题】We take the pleasure ___ informing you that the shipment has gone per s.s “Victory” and hope that it will arrive at the destination in ___ condition.
A.
in; good
B.
onto; perfect
C.
for; complete
D.
of; perfect
【简答题】Identify and correct the mistake(s). Write the correct sentence on the line. Note there is no mistake in one of the sentences. If the sentence is correct, please write "No mistake." on the line. I wil...
【单选题】【2019年真题】对传染病患者必须做到“三早”:早发现、早隔离、早治疗。这主要是为了 ( )。
A.
控制传染源
B.
切断传播途径
C.
提高易感人群的抵抗力
D.
检疫传染病
【单选题】We have the pleasure to inform you that the shipment has gone per s.s. East Wind and hope that it will arrive at the destination in ______ condition.
A.
on, good
B.
for, complete
C.
forward, perfect
D.
onto, perfect
【简答题】将下面的词汇连线组成词组
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