采用不同的指示剂测定水的碱度,可得不同的结果。()
参考答案:对
网络中交往的对象具有下列特点:
① 虚拟性 ② 间接性 ③ 直接性 ④隐蔽性
A.①②③
B.①③④
C.②③④
D.①②④
[听力原文] 6-7
M:Who do you work for
W:(6) ABC Company.
M:They’re in the dress business,aren’t they
W:That’s right.I’m the secretary to the General Manager.What about you
M:(7) I work for IBM.
W:(7) So you’re in computers.
M:Yes,I’m a product manager.
W:What are you working on at the moment
M:I can’t give you all the details.because it’s a secret.But we are developing a new product for the
What does the man deal with()
A.Dress.
B.Computers.
C.Shoes.
D.Engines.