皮皮学，免费搜题
登录
搜题
【简答题】
标准状态是指在压力是( )kPa,温度为( ) K下的状态。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】（本题4分）按要求写出下列反应式。 （1）工业电解饱和食盐水制Cl 2 （离子反应方程式）： （2）CH 3 CHO与银氨溶液发生银镜反应（化学反应 方程式）：
【多选题】属于拉削加工生产效率高的原因的是( )。
A.
机床在一个行程内可完成粗、半精、精加工
B.
机床传动系统简单,且为液压传动,平稳无振动。
C.
拉刀为多刃刀具,多个刀刃同时切削
D.
刀具、工件均为浮动安装,缩短了辅助工艺时间
【单选题】According to Paragraph 6, which of the following is true of the effect of vaccines on different groups of people?
A.
The vaccines will not be effective on unhealthy young adults
B.
The elderly will be less likely to have major complications after vaccination.
C.
The vaccines are effective on people of all ages if they are healthy.
D.
Flu vaccines are of no use for old people or people with chronic diseases
【单选题】Which of the following is NOT among the achievements of Descoings?
A.
Starting exchanges with universities in the U. S.
B.
Attracting overseas students to Paris.
C.
Enrolling lots of immigrant students.
D.
Establishing new research centers.
【单选题】Which of the following is NOT among the artistic features of Whitman ’ s writing? ( )
A.
Free verse
B.
The use of the poetic “ I ”
C.
Allegory
D.
Musicality and rhythm
【简答题】按要求写出下列反应式。 (1)金属钠和水反应（化学反应方程式）________________。 (2)实验室加热浓盐酸和二氧化锰的混合物制Cl 2 （离子反应方程式）________________。 (3)溴乙烷与KOH的乙醇溶液共热（化学反应方程式）____________________。
【单选题】Malik's sleep was___ by the loud sound of hail smashing against his bedroom window.
A.
interrupted
B.
concealed
C.
assisted
相关题目：