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1.ʱ䣺180ӣΪ160֡
2.ȫ⣬ѡ⡢ѡͰ⡣
3.ѡͶѡʱ2BǦڴͿѡѡ 4.ʱúɫīˮڴָλ :_________ :_________
һѡ⣨20⣬ÿ1֡ѡУֻ1⣩
1װʽװҪ˵ȷǣ A.װλʱǿΪǿȵ70% B.ưʽʱÿһ泯
C.ĽС60ʱӦõܻװⵣ D.ԤӦѹǿȴ20 Mpaܵװ 2·㡢ĽṹͼӦ루 Ӧ A. B. C.Ҫ D.ͨ
3ù̯̻ˮ·ʱС̯̺ȲСڣ m A2.25
1 ҳ 16 ҳ
B2.75 C3.50 D3.75
4붥ܼдཬٶʩɺˮɰúˮɰûཬҪΪˣ A.չ B.֤ܵλȷ C.ֹܵ© D.ٵ
5ˮϵͳҪкƺͷϵͳһˮϵͳˮˮϵͳˮˮϵͳˮɹˮԾˮͽֵϴˮˮˮϵͳǣ ˮϵͳ
Aʽ B
Cȫ Dȫ
6ˮͱ÷õ»¸ֽṹصǣ
A.ϱڱͽṹ B.ʽϵ C.нϸ߿ D.õҪ 7ֱܵ( ) A Bų Cˮ
2 ҳ 16 ҳ
Dɢ
8ػɰȵػĴʽǣ Aӽ Bˮ̽ C Dѹʵ
9Ըӽṹ̸ӡѵӦòȡ ֶΣȷʩ ȫ
A. B. C.ϵת D.ֲʱӹ
10Ӧòбķѡ̣ҵʣƷ֤г֤
AƷϸ֤ BƷ˵ CƷ鱨浥 DƷʸ
11ڼǿȵԼӦڣ ȡ
AϺ 30min Bص
CʿϺ 60min Dص
12Ȱ·Ӧ̯̲Ȼ¶ȵڣ ɿŽͨ
A.30 B.40
3 ҳ 16 ҳ
C.50 D.60
13Ȼǣ
A() BZβ Cβ Dʽ
14êڿڷʽУˮЧϲǣ
Aȫ淨 BοԤ
CиڣCRD D˫ڵӷ
15йڴѷУڿƻṹԡȶΣصǣA.ѷ B.ѷ
C.ᴩѷ D.ѷ
16êڷʩṹʱ˲õʩΪ
Aȫ淨 B̨ Cڵӷ D
17ȼܵԽӵʱ˲( )
Aֹ Bī
4 ҳ 16 ҳ