搜题请搜索小程序“爱下问搜题”
问题 选择题

下面是人们对于化学科学的各种常见认识，其中错误的是（  ）

A．化学将在能源、资源的合理开发和安全应用方面大显身手

B．化学是一门具有极强实用性的科学

C．化学是一门以实验为基础的自然科学

D．化学面对现代日益严重的环境问题显得无能为力

答案

答案：D

题目分析：化学是一门综合性、实用性科学，对于现代日益严重的环境问题可以从化学角度，开发新的能源，以减少有害气体的排放，所以D错。

单项选择题 A1/A2型题

以下检查对肝癌的诊断最有临床价值的是（）

A.肝区疼痛

B.肝脏触之质硬

C.触诊肝脏有压痛

D.肝边缘钝

E.肝进行性肿大，表面不平
查看答案
单项选择题

When I was young, my parents ran a snack bar in our small town.One evening in early April, my mother told me to fill in at the snack bar (1) a worker who had the flu. I told her I would mess it up, (2) I had never worked at the bar before. I (3) that instead of making money, I would end up owing it."You can do it," said my mother," (4) , you won’t get much business until lunch. ""But I’ll never remember the orders, and I’m no good (5) money. Please, Mom, don’t (6) me."Then I’ll help you", she said.I shrugged my shoulders. I thought my mother’s (7) was a bad one, but I (8) .When I got to the bar the next day, I found my mother was (9) . Because the weather that day was rainy and cold, people wanted hot snacks and drinks. (10) , I was really slow at taking the orders and making change. The line of people grew, and everybody seemed (11) , I was so nervous that my hands shook, and I (12) a cup into pieces. What a mess! Then my mother came to (13) me, and she also showed me how to make (14) . If someone gave me $ 5 for something that cost $ 3.25, I handed over (15) quarters and a dollar and said, "75 cents makes four dollars, plus one dollar makes five. " Things went more (16) after that.By the end of the day, I could remember orders, (17) the bill, and make change quickly with a smile. I was even a little (18) when the sun came out and dried up business. My mother said she was proud of me, and when she (19) that I work at the snack bar again next year, I did not even shrug. I was too busy (20) the restaurant I would open one day.

 

第（5）空应选择（）

A．of

B．on

C．about

D．with
查看答案