皮皮学，免费搜题
登录
搜题
【单选题】
在维修发动机系统时,下列说法正确的是A.
维修发动机燃油系统时，维修现场需要放置灭火器
B.
维修发动机燃油系统时，发动机熄火后，直接操作即可
C.
启动发动机前，需要检查汽油是否足够
D.
由于都是自动挡的车，没有必要检查档位
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
【单选题】Some large cities in the USA offer different _____ of public transportation.
A.
meaning
B.
mean
C.
means
【简答题】安装车刀时,若刀尖低于工件回转中心,其工作角度与其标注角度相比将会(
)。A. 前角不变，后角减小 B. 前角变大，后角变小 C. 前角变小，后角变大 D. 前、后角均不变
【单选题】安装车刀时, 若刀尖低于工件回转中心,其工作角度与其标注角度 相比将会( )
A.
前角不变，后角减小
B.
前角变大，后角变小
C.
前角变小，后角变大
D.
前、后角均不变。
【单选题】安装车刀时,若刀尖低于工件回转中心,其工作角度与其标注角度相比将会( )。 A. 前角不变,后角减小;B. 前角变大,后角变小;C. 前角变小,后角变大;D. 前、后角均不变。
A.
前角不变，后角减小；
B.
前角变大，后角变小；
C.
前角变小，后角变大；
D.
前、后角均不变。
【单选题】Unemployment in some large cities was _______ problem that the government had to provide free grain for many of the poor people.
A.
so a serious
B.
a such serious
C.
a so serious
D.
such a serious
【简答题】Farms Appear in Cities When you hear the word "farm", you may imagine the countryside with cows and crops. But scientists say the farms of the future could be built in tall buildings in some large cit...
【单选题】听力原文： There are stock markets in large cities in many countries. Stock markets in Paris, London, Tokyo, Shanghai and New York are among the largest and most well-known. The stock market, also called s...
A.
You can always make money.
B.
You can tell exactly when the stock goes up or down.
C.
You may sometimes lose money.
D.
Your gambling is always safe.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
