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【单选题】
正常菌群在一定的条件下可引起疾病,称条件致病菌,常见的条件或原因不是
A.
菌群失调
B.
营养过剩
C.
居住部位的改变
D.
使用抗肿瘤药物
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举一反三
【单选题】Which of the following statements is NOT TRUE?
A.
Louis was famous for his discovery.
B.
Though his left arm and leg were disabled(残疾的), he worked even harder than before.
C.
In his childhood he made up his mind to become a doctor.
D.
His disabled left arm and leg had nothing to do with the mad dogs.
【单选题】土壤团粒结构近于球形,其直径在( )mm之间。
A.
0.01~0.25
B.
0.25~10
C.
2~3
D.
0.01~10
【单选题】If you had _____ your test paper carefully before handing it in, you would have made fewer mistakes.
A.
lookedup
B.
thoughtabout
C.
goneover
D.
goneround
【判断题】发动机异响故障会出现发动机正常运转时所没有的响声,同时会出现发动机振抖、运转不稳定、功率下降、燃润料消耗增加、运转无力、排气管排烟颜色异常等现象。
A.
正确
B.
错误
【简答题】You can get evacuation details through the ways provided by the website of Las Vegas though it doesn't disclose the details due to ______.
【单选题】It is very ______ of you to take care of the children while their parents are away.
A.
thoughtful
B.
thankful
C.
thoughtbess
D.
thoughtfulness
【单选题】金属扣合工艺的扣合键除选用镍铬不锈钢外还可选用______。
A.
高碳钢
B.
中碳钢
C.
低碳钢
D.
耐热钢
【单选题】_________ 查看材料
A.
moreover
B.
therefore
C.
however
D.
though
【单选题】船政造船经历的三个时期分别是:“木船时期”、“()”、“钢船时期”。
A.
铁船时期
B.
钢木合构时期
C.
木铁合构时期
D.
蒸汽时期
【单选题】发动机异响故障会出现发动机正常运转时所没有的响声,同时会出现发动机振抖、( B )、排气管排烟颜色异常等现象。
A.
运转不稳定、功率下降、燃润料消耗增加
B.
运转不稳定、功率下降、燃润料消耗增加、运转无力
C.
功率下降、燃润料消耗增加、运转无力
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