皮皮学，免费搜题
登录
搜题
【单选题】
当冲水活门失效在开位时，可用人工关断手柄关闭人工关断活门：（）A.
拉人工关断手柄关闭活门，推人工关断手柄打开活门
B.
拉人工关断手柄打开活门，推人工关断手柄关闭活门
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】The rapid growth of microcomputer systems since the late 1970s has now resulted in BASIC being very likely the most widely used computer language in the world.
【单选题】The plastic bags were first produced in the 1970s and grew increasingly popular since the 1980s.
A.
Y
B.
N
C.
NG
【简答题】Since the 1970s, scientists have been searching for ways to connect the brain with computers. Braincomputer intece(BCI) technology could help people with disabilities send commands to machines. Rec...
【单选题】Since the late 1970s, in the face of a severe loss of market share in dozens of industries, manufacturers in the United States have been trying to improve productivity and therefore enhance their inte...
A.
summarizing a thesis
B.
recommending a different approach
C.
comparing points of view
D.
making a series of predictions
【单选题】Since 1970s, there is a tremendous growth in ____________.
A.
manufacturing industry
B.
foreign trade
C.
high-tech industry
D.
the service sector
相关题目：
参考解析：
知识点：
题目纠错 0
发布
