皮皮学,免费搜题
登录
搜题
【单选题】
下列试剂保存方法或实验方法不正确的是
A.
盛浓硝酸、硝酸银用棕色试剂瓶,并置于阴凉处
B.
用带玻璃塞的磨口玻璃瓶盛氢氧化钠
C.
金属钠、钾通常保存在煤油里
D.
可用(NH 4 ) 2 SO 4 代替NH 4 Cl与消石灰混合加热制取NH 3
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
【单选题】I must try to make ______ as I can of this project which I have undertaken.
A.
as a logical survey
B.
such a logical survey
C.
the same logical survey
D.
as logical a survey
【单选题】______ must make his instructions to ______ clear in his collection order.
A.
The remitting bank the collecting bank
B.
The principal the drawee
C.
The principal the remitting bank
D.
The drawee the collecting bank
【单选题】双代号网络图中,以下属于虚箭线特点的是(  )
A.
占用时间
B.
占用资源
C.
表示工作
D.
表示逻辑关系
【多选题】纱线分类方法有多种,按后加工分为( )。
A.
本色纱
B.
染色纱
C.
漂白纱
D.
烧毛纱
E.
丝光纱
【单选题】A good film producer must make sure that his films ____ fit into the needs of the changing market.
A.
are to
B.
will
C.
are going to
D.
are about to
【单选题】Anyone, if he _______ in his career, must be self- confident and make constant efforts towards his goal.
A.
succeeds
B.
will succeed
C.
is to succeed
D.
is about to succeed
【多选题】下列属于双代号时标网络的特点是( )
A.
兼有网络计划和横道计划的优点
B.
可以在图上直接显示工作的总时差
C.
可以在图上直接显示工期
D.
便于资源优化和调整
E.
双代号时标网络中有虚工作,但无虚箭线。
【简答题】_____.I must be leaving now. ______ you will close all the windows and doors . A.To make sure B Make sure C.Being made sure D. sure.
【单选题】He must learn to his medicine.
A.
ask for
B.
take
C.
make up
D.
buy
【简答题】I must thank my parents ________to be a college student. A.to make it possible for me B.to make it possible to me  C.for it possible for me D.for it possible to me
相关题目: