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【简答题】
A．even if B．as though C．all right D．even though
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举一反三
【简答题】A．It is essential to be positive about one's goal. B．It is important to score goals in life. C．It is essential to try to be a good loser. D．It is not important to keep one's goal in mind.
【简答题】测得某溶液 pH=2.007 ,该值具有 ________ 位有效数字,氢离子活度的正确表示为 ____________ 。
【单选题】It is essential to reserve a computer three days in advance if you want to use one.
A.
真
B.
假
C.
NOT GIVEN
【简答题】测得某溶液pH值为2.007，该值具有______位有效数字，氢离子活度应表示为______。
【单选题】What does Margherita say about presenting a show?
A.
It is essential to keep in mind what is going to happen next.
B.
It is more complicated than she had previously thought.
C.
The ability to add and subtract is the most important requirement.
D.
The contend of a show is sometimes changed suddenly.
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