D环

题型:名词解释

问题:

D环

考点:生物学DNA与染色体DNA与染色体题库
题型:名词解释

9月23日前后,北半球

A.昼长夜短

B.昼短夜长

C.昼夜等长

D.无法确定

题型:名词解释

船舶污染物是指油类和油性混合物两种。

题型:名词解释

列哪些患者需要抗结核化学治疗()

A.女性,22岁,反复咳嗽伴1热2月,胸片检查左上肺云雾状阴影

B.男性,28岁,反复咳嗽1月,痰涂片找到抗酸杆菌

C.女性,34岁,体检发现右上肺结核球,无自觉症状,痰涂(—),PPD(—)

D.女性,18岁,咽部不适1月,病理活检为喉结核

E.男性,55岁,体检胸片提示双上肺陈旧性肺结核

题型:名词解释

超家族

题型:名词解释


Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choices marked A, B, C and D.

Historians tend to tell the same joke when they are describing history education in America. It’s the one (51) the teacher standing in the schoolroom door (52) goodbye to students for the summer and calling after them. "By the way, we won World War II."
The problem with the joke, of course, is that it’s not funny. The recent surveys on (53) illiteracy are beginning to numb. nearly one third of American 17-year-olds cannot even (54) which countries the United States fought against in that war. One third have no idea when the Declaration of Independence was (55) . One third thought Columbus reached the New World after 1750. Two thirds cannot correctly (56) the Civil War between 1850 and 1900. Even when they get the answers right, some are just guessing.
Unlike math or science, ignorance of history cannot be (57) connected to toss of international competitiveness. But it does affect our future (58) a democratic nation and as individuals.
The good news is that there is growing agreement on what is wrong with the (59) of history and what needs to be done to fix it. The steps are tentative (尝试性的) (60) yet to be felt in most classrooms.

A.about

B.in

C.for

D.by

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