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【单选题】
心肺复苏时胸外按压的部位是（ ）A.
胸骨上段
B.
胸骨中下段
C.
胸骨中段
D.
剑突
E.
胸骨下半部
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【简答题】已知 为常数， ，在区间 上的最大值是2，则
【简答题】已知 其中 为常数，若 ，则 =
【单选题】'What's in a name? That which we call a rose By any other name would smell as sweet So Romeo would, were he not Romeo called' (Romeo and Juliet, Act 2, Scene 2,43-45) To what characteristics of langua...
A.
Creativity.
B.
Productivity.
C.
Duality.
D.
Arbitrariness.
【简答题】已知 为常数，函数 在区间 上的最大值为2，则 ＝ .
【简答题】已知 ，其中 、 为常数，且 ，若 为常数，则 的值为 .
【单选题】Chinese people place a person’s family name before the given name, _______ people in many other countries do the opposite.
A.
but
B.
and
C.
however
D.
while
【单选题】The difference between the name of a service company and those of other companies is that
A.
the products are tangible but services are not.
B.
the name of a service company is a company's image but the names of other companies are not.
C.
customers are loyal to brand names of products but are not to names of services.
D.
brand names can help service companies to expand their business but cannot help other companies in this aspect.
【简答题】已知 为常数，函数 在区间 上的最大值为 ，则实数 的值为_____________．
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