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【单选题】
用声压级（分贝dB）来表示人耳能听到的声音范围在0～（）dB。A.
120
B.
150
C.
180
D.
200
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】Whales are ______ ____ as mammals ( 哺乳动物 ) . ( classif y)
【单选题】The best title for this passage is
A.
The Functions of the Programmed Decisions
B.
The Classifications of Decision-Making
C.
The Purpose of Routine Decisions
D.
The Origin of Different Decisions
【单选题】把当前窗口的画面复制到剪贴板上，可按（ ）键
A.
Alt+Print Screen
B.
Print Screen
C.
Shift+ Print Screen
D.
Ctrl+Print Screen
【简答题】Come vengono classificate le monete?
【单选题】以下说法正确的是( )。 A .#define和printf都是C语句 B.#define 是C语句,而printf不是 C .printf是C语句,但#define不是 D.#define 和printf都不是C语句
A.
B.
C.
D.
D
【单选题】Le donne vengono assunte di meno perché
A.
non esiste una legge che le protegga
B.
la legge le protegge troppo
C.
la legge protegge soprattutto gli uomini
【单选题】It is taken as a great contribution made by ______ that languages in the world are classified into different language families according to their genetic relations.
A.
modem linguists
B.
traditional grammarians
C.
sociolinguists
D.
historical linguists
【单选题】有下列结论： （1）命题p：?x∈R，x 2 ＞0总成立，则命题?p：?x∈R，x 2 ≤0总成立． （2）设 p： x x+2 ＞0，q： x 2 +x-2＞0 ，则p是q的充分不必要条件． （3）命题：若ab=0，则a=0或b=0，其否命题是假命题． （4）非零向量 a 和 b 满足 | a |=| b |=| a - b | ，则 a 与 a + b 的夹角为30°． 其中正确的结论有（ ...
A.
0个
B.
1个
C.
2个
D.
3个
【单选题】把当前窗口的画面复制到剪贴板上,可按( )键
A.
Shift+Print Screen
B.
Ctrl+Print Screen
C.
Alt+Print Screen
D.
Print Screen
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