钻探用硬质合金应满足（） A.抗压强度 B.硬度和耐磨性 C.热硬性 D.抗拉强度

下列句子中有错别字的一项是[ ]

A、我们仍能看到那些倒下去的拓荒者的墓碑，但是悲痛只能使他们更加坚定开拓前进的决心。

B、问君此去几时来，来时莫徘徊！

C、别以为这房间杂乱无张，我曾经想收拾一下，后来发觉那是徒劳的。

D、画眉在树林里宛转地唱歌；锯木厂后边的草地上，普鲁士兵正在操练。

在对话的空白处填上适当的句子，使对话意义完整，语法正确。

A: Maria, have you heard the news on the radio about the space flight to Mars?

B: 1______. Who will take part in it?

A: The astronauts from China, the United States and Russia. 2______. They can travel to space

    and discover something new about Mars. I'd like to be an astronaut when I grow up.

B: It's really cool. However, 3______ and master some basic skills.

A: True. Maria, what are you going to be?

B: Mmm, 4______. Sometimes I want to be a dancer, but I think I'm going to be a scientist in the future.

A: Why? I think you dance very well.

B: Yes, I'd like to perform ballet on the stage in the future. But 5______ .It is my favorite subject in school.

    I believe more and more things will be discovered in the future.

A: That's wonderful! We all need to work hard.

下列哪种情况无法从血培养获得病原体()

A．败血症(sopticemia)

B．菌血症(bacteremia)

C．毒血症(toxemia)

D．脓毒血症(sepsis)

E．脓血症(pyemia)

世界上最受欢迎的黑色酿酒葡萄是什么？

下列各项当事人中，不得担任A上市公司的独立董事的有（）。

A.甲受雇担任A上市公司全资子公司的技术指导人员

B.乙的弟弟担任A上市公司的财务负责人

C.丙半年前为A上市公司高级管理人员讲授养生课程一天

D.丁自己创办的B公司为A上市公司原材料供应商之一