被称为地球上“肺”的是______.

题型:填空题

问题:

被称为地球上“肺”的是______.

考点:生态系统的多样性
题型:填空题

消除设备有形磨损和无形磨损的重要手段是( )。

A.修理

B.现代化改装

C.设备更新

D.加速折旧

题型:填空题

阅读理解。

     How words came into being is unknown. All we assume (推测) is that some early men invented certain

sounds, in one way or another, to express thoughts and feelings, actions and things, so that they could talk

with each other. Later they agreed upon certain signs, called letters, which could be put together to show

those sounds, and which could be written down. Those sounds, whether spoken or written in letters, are

called words.

     The power of words, then, lies in their associations-the thing they bring up to minds. Words become

filled with meaning for us by experience; and the longer we live, the more certain words bring back to us the

happy and sad events of our past; and the more we read and learn, the more the number of words that means

something to us increases.

     Great writers are those who not only have great thoughts but also express these thoughts in words which

have powerful effects on our minds and feelings. This clever use of words is what we call literary style (文

体). Above all, the real poet is a master of words. He can express his meaning in words which sing like music,

and which by their position and association can move men to tears. We should therefore learn to choose our

words carefully and use them correctly, or they will make our speech silly and common.

1. We learn from the text that language might have begun with _____. [ ]

A. expressions

B. actions

C. signs

D. sounds

2. What is mainly discussed in Paragraph 2? [ ]

A. The meaning of new words.

B. The relation of human experience with words.

C. The importance of old words.

D. The gradual change and development of words.

3. In the last paragraph, what does the author suggest that we should do? [ ]

A. Use words skillfully.

B. Make musical speeches.

C. Learn poems by heart.

D. Associate with listeners.

题型:填空题

患者,男,8岁。患血友病5年,多次接受Ⅶ因子和输血治疗,近2个月反复发热,口服抗生素治疗无效。实验室检查:CD4细胞减少,CD8T细胞正常,CD4/CD8比值降低,Anti-HIV阳性。疑似:HIV感染。此时患者血清中增高的可溶性黏附分子是()

A.P选择素

B.L选择素

C.E选择素

D.ICAM-1

E.可溶性E选择素

题型:填空题

某企业领导决定将企业资源计划引入到组织中,但大部分员工要么根本没听说过,要么对这一计划一知半解,所以整个公司人心惶惶,对企业变革后的状况捉摸不定。在这种情况下,作为领导者,现在最需要做的是()。

A、预见反应和反抗,准备应对办法

B、对变革充满热情

C、明确变革目标,展示变革的理由和利益

D、直面反抗

题型:填空题

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