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【单选题】
一个电阻负载两端电压为U,流过的电流为I。它的电阻R和所消耗的功率P分别为:(U、I、R、P的单位分别为伏特、、欧姆、瓦特,”x^m”表示“x的m次方”)()
A.
R=U/I,P=U×I
B.
R=I/U,P=U^2/I
C.
R=U×I,P=U/I^2
D.
R=U^2/I,P=U^2×I
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举一反三
【单选题】是利用叶轮高速旋转而主要将速度能传给液体而吸排液体的泵。
A.
喷射泵
B.
离心泵
C.
齿轮泵
【单选题】【单选】 是利用叶轮高速旋转而主要将速度能传给液体而吸排液体的泵。
A.
喷射泵
B.
离心泵
C.
齿轮泵
【简答题】一数一源能够保证主题数据库中数据的及时、准确和()。
【单选题】下列选项中,能够满足“若字符串sl等于字符串s2,则执行sT”要求的是( )。
A.
B.
C.
【判断题】个人全能决赛是由资格赛中个人全能成绩前24名的运动员参加(每只队伍最多有2名运动员)。( )
A.
正确
B.
错误
【简答题】Oral Task 1 Directions: Based on the materials about "9.11" PR, please yze the features of super power PR and upload your recorded ysis here.
【单选题】下列选项中,能够满足只要字符串s1等于字符串s2,则执行ST要求的是
A.
if(s1=s2)ST;
B.
if(strcpy(s1,s2)=1)ST;
C.
if(strcmp(s2,s1)=0)ST;
D.
if(s1-s2=0)ST;
【单选题】哪一项是利用叶轮高速旋转而主要将速度能传给液体而吸排液体的泵?
A.
喷射泵
B.
离心泵
C.
齿轮泵
【单选题】下列选项中,能够满足“若字符串s1等于字符串s2,则执行ST”要求的语句是
A.
if (strcmp(s2, s1) == 0 ) ST;
B.
if (s1 == s2 ) ST;
C.
if ( strcpy(s1, s2) ==1 ) ST;
D.
if ( s1-s2 == 0 ) ST;
【单选题】Analyze the following statement, and then choose one of the options that you think is best to use in academic writing:To test whether these two species may possibly coexist in the same biotope, we tri...
A.
To test whether these two species coexist in the same biotope, we applied our newly developed method.
B.
To test whether these two species might coexist in the same biotope, we applied our newly developed method.
C.
To test whether these two species could coexist in the same biotope, we applied our newly developed method.
D.
To test whether these two species can possibly coexist in the same biotope, we applied our newly developed method.
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