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【多选题】
下列关于酸雨的形成说法正确的是( )A.
我国的酸雨主要是由于SO2被氧化成硫酸导致的。
B.
SO2 氧化成硫酸的过程有气相氧化和液相氧化两种途径。
C.
降水的酸性与大气中酸性物质和碱性物质的相对含量有关。
D.
天然降水呈中性，因此将PH < 7.0 的降雨称为酸雨。
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【简答题】Be courteous to all, but ( )with few, and let those few be well tried before you give them your confidence. True friendship is a plant of slow growth, and must undergo and withstand the shocks of ...
【单选题】To be courteous, you should not be ( ).
A.
bad-natured
B.
tactful
C.
thoughtful
D.
appreciative
【单选题】How can you be courteous to women?
A.
Treat women with respect.
B.
Be respectful to women in your actions.
C.
Be respectful to women as you part ways in the evenings.
D.
All of the three.
【简答题】按规律填空． （1）1，4，9，16，25，______，______． （2）1，7，2，7，4，7，8，7，______，______．
【简答题】Your company will be judged by the way you answer the telephone, so it is very important that you be courteous, happy, and ever so willing to help in the first contact you make with the caller.
【简答题】STEP 4 Be courteous by 4) . Your host may love to wait on you, but offering to 5) , do the dishes or take out the trash might be a pleasant change of pace for them.
【单选题】设A={0，1，2，4，5，7}，B={1，4，6，8，9}，C={4，7，9}，则（A∩B） （A∩C）=（ ）
A.
{1，4}
B.
{1，7}
C.
{4，7}
D.
{1，4，7}
【单选题】To be courteous when writing a letter you should ______.
A.
respond as early as possible
B.
point out the mistakes your reader has made
C.
use an indirect approach
D.
use correct language
【单选题】Be kind and courteous to the interviewer , not sitting ___ you are told to do so.
A.
if
B.
as
C.
until
D.
because
相关题目：
【单选题】To be courteous, you should not be ( ).
A.
bad-natured
B.
tactful
C.
thoughtful
D.
appreciative
【单选题】设A={0，1，2，4，5，7}，B={1，4，6，8，9}，C={4，7，9}，则（A∩B） （A∩C）=（ ）
A.
{1，4}
B.
{1，7}
C.
{4，7}
D.
{1，4，7}