It wasn't until the 2010 CCTV Spring Fes

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问题选择题

It wasn't until the 2010 CCTV Spring Festival Gala (央视春晚) _____. [ ]

A. did the former pop band Little Tiger reunite

B. that the former pop band Little Tiger reunited

C. then did the former pop band Little Tiger reunite

D. when the former pop band Little Tiger reunited

答案

答案：B

单项选择题

在急性肺炎患者血液中分离出一株细菌，血平板上灰白色，α-溶血扁平较小菌落，革兰染色为阳性双球菌，矛头状，坦面相对，触酶试验阴性，杆菌肽试验阴性，Optochin敏感试验阳性，胆汁溶菌试验阳性，6.5%的NaCl生长试验阴性。此菌最可能是（）

A.金黄色葡萄球菌

B.D群链球菌

C.肺炎链球菌

D.A群链球菌

E.肠球菌

单项选择题

当发生（）的特殊情况时，对柴油机要采取紧急停车操作。

A.温度升高

B.油压降低

C.井场井喷

D.转速不稳