Our physics teacher and English teacher

题型:选择题

问题:

Our physics teacher and English teacher always give their lessons in a lively and clear way,____ greatly benefits us students.

A.from which

B.in which

C.that

D.which

考点:限制性定语从句非限制性定语从句
题型:选择题

甲状腺激素抑制试验下列哪项正确()。

A.了解垂体-下丘脑轴调节功能障碍

B.正常人抑制率大于70%

C.正常人抑制率大于25%

D.抑制率小于25%为甲低

E.抑制率小于25%或不受抑制为甲亢

题型:选择题

科技日报报道:辉钼(MoS2)在纳米电子设备制造领域比硅或富勒烯(如C60)更有优势。从不同角度观察MoS2的晶体结构见图。已知:Mo位于第五周期VIB族。

(1)晶体硅中硅原子的轨道杂化类型为______。

(2)电负性:C______S(填“>”或“<”)。

(3)晶体硅和C60比较,熔点较高的是______。

(4)Mo元素基态原子的价电子排布式为____________。

(5)根据MoS2的晶体结构回答:

①每个Mo原子周围距离最近的S原子数目为______。

②Mo-S之间的化学键为______(填序号)。

A极性键;B非极性键;C配位键;D金属键;E范德华力

③MoS2纳米粒子具有优异的润滑性能,其原因是______。

题型:选择题

—瓶氢气和—瓶氧气的密度相同,都处于平衡状态,分子平均平动动能相等,则它们()。

A.温度和压强都不相同

B.温度相同,压强相等

C.温度相同,但氢气的压强大于氧气的压强

D.温度相同,但氢气的压强小于氧气的压强

题型:选择题

注册会计师努力达到形式上的独立性,以便( )

A.保持公众对执业界的信任

B.达到实质上的独立

C.遵守审计准则

D.持公正的、不偏不倚的精神状态

题型:选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.

(1) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

(2) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.

(3) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.

(4) is a device used to connect two separate network that use different communication protocol.

(5) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

4()

A.Router

B.Gateway

C.Bridge

D.Hub

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