现代生物分类中,通常将蓝藻和细菌单独成立为()界。 A.原生生物 B.原核生物 C.

题型:单项选择题

问题:

现代生物分类中,通常将蓝藻和细菌单独成立为()界。

A.原生生物

B.原核生物

C.原始生物

D.低等植物

考点:生物学植物生物学植物生物学题库
题型:单项选择题

期货公司应当及时将投资者适当性制度实施方案及相关制度报中金所和公司所在地中国期货业协会派出机构备案。()

题型:单项选择题

苯唔布洛芬是一种消炎镇痛的药物。它的工业合成路线如下:

请回答下列问题:

(1)A长期暴露在空气中会变质,其原因是______________________。

(2)由A到B的反应通常在低温进行。温度升高时,多硝基取代副产物会增多。下列二硝基取代物中,最可能生成的是_______________。(填字母)

(3)在E的下列同分异构体中,含有手性碳原子的分子是____________(填字母)

(4)F的结构简式:________________。

(5)D的同分异构体H是一种α-氨基酸,H可被酸性KMnO4溶液氧化成对苯二甲酸,则H的结构简式是

______________。高聚物L由H通过肽键连接而成,L的结构简式是________________。

题型:单项选择题

配制100mL 0.100mol/L Na2CO3溶液时,有下列步骤:

①溶解    ②转移   ③定容   ④计算   ⑤称量,

正确的顺序为(  )

A.⑤④①②③

B.⑤④②①③

C.④⑤①②③

D.④③⑤①②

题型:单项选择题

叙述变速器的工作原理

题型:单项选择题

"Intelligence" at best is an assumptive construct--the meaning of the word has never been clear. It is generally agreed that a person of high intelligence is one who can grasp ideas (1) , make distinctions, reason logically, and (2) verbal and mathematical symbols in solving problems. An intelligence test is a rough measure of a child’s (3) for learning, particularly for learning the kinds of things required in school. It does not (4) character, social adjustment, physical endurance, manual skills, or artistic abilities. It is not (5) to--it was not designed for such (6) . To criticize it for such failure is roughly (7) criticizing a thermometer for not measuring wind velocity.

The other thing we have to notice is that the assessment of the intelligence of the (8) is essentially a comparative affair.

(9) the assessment of intelligence is a comparative matter we must be sure that the (10) with which we are comparing our subjects provides a "valid" and " (11) " comparison. It is here (12) some of the difficulties which interest us begin. Any test (13) involves at least three factors: the (14) to do one’s best, the knowledge required for understanding what you have to do, and the (15) ability to do it. In school populations in our culture these assumptions can be made fair and reasonable, and the value of intelligence testing has been (16) thoroughly. Its value (17) , of course, in its providing a satisfactory basis for prediction. No one is (18) interested in the marks a little child gets on his test; what we are interested in is whether we can (19) from his mark on the test that the child will do better or worse than other children of his age in (20) which we think require "general intelligence".

Read the following text. Choose the best word(s) for each numbered blank and mark [A] , [B] , [C] or [D] on ANSWER SHEET I.20()

A.respects

B.honors

C.angles

D.distinctions

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