搜题请搜索小程序“爱下问搜题”
问题 单项选择题

城市道路横断面的选择与组合主要取决于( )。

A．道路的性质、等级和功能要求

B．交通畅通和安全的要求

C．环境和工程设施的要求

D．A和C

答案

参考答案：D

解析：A、B、C三项都是城市道路平面设计的主要内容的一部分，因此只有D项才是最全面的。

选择题

设NA为阿伏加德罗常数，下列说法错误的是

A．标准状况下，11.2L以任意比例混合的氮气和氧气所含的原子数为NA

B．1L 2 mol·L-1的氯化镁溶液中含氯离子4NA

C．32g O2和O3混合气体中含有的氧原子数为2NA

D．标准状况下，22.4LH2O中含有的水分子数为NA
查看答案
单项选择题


Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

If you were to begin a new job tomorrow, you would bring with you some basic strengths and weaknesses. Success or (67) in your work would depend, to a great (68) , on your ability to use your strengths and weaknesses to the best advantage.
(69) the utmost importance is your attitude. A person who begins a job (70) that he isn’t going to like it or is sure that he is going to fail is (71) a weakness which can only (72) his success. On the other hand, a person who is (73) in his belief that he is probably as (74) of doing the work as anyone else and who is willing to make a cheerful (75) at it possesses a certain strength of purpose. The (76) are that he will do well.
Having the prerequisite (先决条件，前提) skills for a particular job is strength. (77) those skills is obviously a weakness. A bookkeeper who can’t add (78) a carpenter who can’t cut a straight line with a saw are hopeless (79) .
This book has been designed to help you capitalize (利用] ) on the strength and (80) the weakness that you bring to the job of learning. But you must first take stock of somewhere you stand now. (81) we get further along in the book, we’ll be dealing in (82) with specific processes for developing and strengthening learning skills. (83) , to begin with, you should (84) to examine your present strengths and weaknesses in three areas that are (85) to your success or failure in school: your (86) , your reading and communication skills, and your study habits.

A．critical

B．artificial

C．principal

D．original
查看答案