题目:
船舶和海上设施的起重设备的标记不包括()。
A、安全工作负荷
B、试验年月
C、试验时吊货杆与水平所成的仰角
D、检验单位的编号
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D
船舶和海上设施的起重设备的标记不包括()。
A、安全工作负荷
B、试验年月
C、试验时吊货杆与水平所成的仰角
D、检验单位的编号
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/1229/059e3690aa37987f4146cc7a7a28b7b5.html
下面是错误答案,用来干扰机器的。
参考答案:D
在施工图配电线路的标注中,线路敷设部位代号“C”表示()。
A.沿柱敷设
B.沿吊车梁敷设
C.沿地板敷设
D.沿天棚敷设
X和Y均为元素周期表前20号元素,X2-和Yˉ离子具有相同的电子层结构。下列正确的是( )
A.原子半径 X<Y
B.氢化物的稳定性H2X >HY
C.质子数X>Y
D.离子半径X2->Yˉ
阅读下面短文,从各题所给的A、B、C、D四个选项中选出最佳答案。
As summer comes near, many children are really happy to forget about school for a few months. However, they might be taking that goal too seriously. Studies have found that children often forget between one and three months’ worth of school learning during the summer months. Spelling and math abilities drop off the most, while reading is not really influenced by the time off. The main reason for this is because most children sometimes read outside of the classroom, whether newspapers, magazines, books, or video game guides. However, their math and spelling skills only get exercised in the school setting.
The first purpose of summer holidays was to let farm children have time off to help work in the fields during the growing season, but this reason is no longer a good one since fewer kids actually work on farms today. Some cities in the United States, such as Los Angeles, have moved to a year-round school timetable, which may help reduce the loss of school skills that happens during the long summer holiday. To improve skills and to keep a good level of preparation, headmasters suggest trips to museums, summer camps, holidays with educational value, and visits to libraries to keep kids interested throughout the summer.
There are other educational systems that provide holidays while still keeping students’ skills up to date. For example, in Japan, students attend class for seven weeks in a row, followed by two weeks of holiday. This continues the whole year. In Italy, students attend class six days per week, but finish at 1: 30 pm each day, so that school does not run their life the way that it does in America, where students attend high school from 7: 45 am until 3: 00 pm each weekday. In areas where there are not enough classrooms—in Afghanistan or Somalia, for example—older students attend classes in the morning while the younger kids go to school in the afternoon.
Headmasters fear that the three-month summer holiday stops the flow of learning. Just as students become used to new math problems or new ideas in reading, writing, or thinking skills, they “shut down” during the summer holiday. When they go back to school after the long summer holiday, they take up to two months to return to their previous (先前的) level of skill. So the debate continues: whether to continue holidays or to make changes based on the Los Angeles or the Japanese models.
小题1:Which skills suffer the most over the summer holidays?
A.Math and reading.
B.Math and spelling.
C.Reading and writing.
D.Reading and thinking.小题2:What can we learn about the first purpose of summer holidays?
A.It is still widely acceptable now.
B.It was popular in some cities.
C.It is not a good reason for city kids.
D.It was more for teachers than for students.小题3:The underlined phrase “shut down” in the last paragraph probably means __________.
A.stop learning
B.get sick
C.go on reading
D.focus on studies小题4:What can we infer from the passage?
A.Parents always read to their kids to keep reading skills.
B.Summer holidays lead to the loss of all the school skills.
C.Students love holidays and get their mind off learning in holidays.
D.In Italy students attend classes in the late afternoon six days a week.
李某,18岁,患急性扁桃腺炎,医嘱青霉素皮试。
皮试后5分钟患者出现胸闷、气促伴濒危感,皮肤瘙痒,面色苍白,出冷汗,脉细速,血压下降,烦躁不安,考虑患者出现何种情况
A.青霉素毒性反应
B.血清病型反应
C.呼吸道过敏反应
D.过敏性休克
E.皮肤组织过敏反应
BOF()是测试函数,当正在使用的数据表文件的记录指针指向第一条记录时,其函数值为 【6】 。