2.2项危险品的名称是()。 A.易燃液体 B.非易燃无毒气体 C.爆炸物 D.杂项

题型:单项选择题

问题:

2.2项危险品的名称是()。

A.易燃液体

B.非易燃无毒气体

C.爆炸物

D.杂项危险品

考点:航空乘务员危险品考试航空乘务员危险品考试题库
题型:单项选择题
(文)设函数y=f(x)=x(x-a)(x-b)(a、b∈R).
(Ⅰ)若a≠b,ab≠0,过两点(0,0)、(a,0)的中点作与x轴垂直的直线,此直线与函数y=f(x)的图象交于点P(x0,f(x0)),求证:函数y=f(x)在点P处的切 线过点(
4
3
3
,0);
(Ⅱ)若a=b(a≠0),且当x∈[0,|a|+1]时f(x)<2a2恒成立,求实数a的取值范围.
题型:单项选择题

骨性Ⅰ类错牙合可能表现为()

A.前牙反牙合

B.前牙深覆盖

C.磨牙远中牙合

D.磨牙近中牙合

E.以上均有可能

题型:单项选择题

根据所给提示,完成句子,每空一词,含缩略词

1. Most people watched TV late in May this year. (改为一般疑问句)

    _______________ most people _______________ TV late in May this year?

2. The students will learn the group dance on the school playground. (对划线部分提问)

    _______________ the students learn the group dance?

3. More and more foreigners speak Chinese in the world now. (改为被动语态)

    Chinese _______________ _______________ by more and more foreigners in the world now.

4. Little Jim is only five years old. He can't make model planes by himself. (合并为一句)

    Little Jim is ______________ young ______________ make model planes by himself.

5. 我们应该多参加课外活动。(完成译句)

    We should                                                    in after-school activities more often.

题型:单项选择题

“图书”表中有字符型字段“图书号”,要求用 SQL DELETE 命令将图书号以字母 A开头的图书记录全部打上删除标记,正确的命令是______。

A.DELETE FROM 图书 FOR 图书号 LIKE "A%"

B.DELETE FROM 图书 WHILE 图书号 LIKE "A%"

C.DELETE FROM 图书 WHERE 图书号= "A *"

D.DELETE FROM 图书 WHERE 图书号 LIKE"A%"

题型:单项选择题

用仪器测试涂膜的光泽,通常用()°角度比较常用。

A.45

B.20

C.60

D.90

更多题库