用甲基绿吡罗红染液对人口腔上皮细胞进行染色,结果发现细胞核呈绿色,细胞质呈红色。

题型:选择题

问题:

用甲基绿吡罗红染液对人口腔上皮细胞进行染色,结果发现细胞核呈绿色,细胞质呈红色。下列解释中正确的是[ ]

A.甲基绿、吡罗红两种染色剂对DNA和RNA的亲和力相同

B.细胞核由DNA构成,细胞质由RNA构成

C.真核细胞中,DNA不分布在细胞质基质中,RNA不分布在细胞核中

D.该实验的结果反映了DNA和RNA在真核细胞中的分布状态

考点:实验:观察DNA和RNA在细胞中的分布
题型:选择题

T细胞受体主要功能是

A.结合黏附分子

B.激活补体系统

C.识别抗原单位

D.结合细胞因子

E.活化巨噬细胞

题型:选择题

One day, two young men went to a small city. They stayed outside a shop for a long time, and they seemed to have nothing to do. The owner of the shop felt they were unusual. So he used his new mobile phone to take a picture of them. After that he sent a message with the picture to the police. The picture surprised the police because the persons in the picture had done something wrong before. And the police were trying to catch them! A police car was immediately sent to the shop. The two young men were caught there. Later a policeman told the reporter, "We think this is the first time in the world that a picture message has been used to help catch criminals(罪犯)."

根据以上内容判断下列句子的正 (T) 误 (F)

小题1:The owner of the shop sent the picture message to the police.

小题2:The two young men went to the shop to buy a new mobile phone.

小题3:The shop owner thought the two young men were kind.

小题4:The two young men were caught by the police.

小题5:The police thought a picture message was often used to help catch criminals.

题型:选择题

下列有关审计抽样的表述中,恰当的有()。

A.如果总体规模小于3000,不能使用PPS抽样

B.PPs抽样适合细节测试中高估资产项目的测试

C.所有传统变量抽样均需要对总体进行分层

D.审计抽样适合于对内部控制运行留下轨迹的控制进行测试

题型:选择题

硫胺素缺乏可导致()。

A.多发性神经炎

B.毛囊角化症

C.湿疹样皮炎

D.脂溢性皮炎

E.脚气病

题型:选择题

要按照隐患分级排查和处理的规定,落实隐患()的整改措施。

A、排查

B、治理

C、整改

D、验收

E、复查

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