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回答题Directions: Read the following text. Choose the best word or phrase for each numbered blank and mark A, B,C, or D on your ANSWER SHEET. In the United States today, families basically have two contrasting attitudes toward television.Many families 26 the television to be on at any time of the day or night. Very often,27 of these families watch television 28 or don' t interact with other family members 29 they are watching. The TV is used to make 30 kind of background noise in the house,31as a kind of electronic babysitter. Parents often turn it on to 32'bored' children. In contrast, oth-er families 33control when the television will be watched and what programs can be watched.34 these families watch programs together and discuss them together. In these homes, the TV is rarely on 35nobody is watching it. Parents don' t use it as an electronic babysitter;36 ,they insist that children read or play 37rather than sit in front of a screen.38the contrasting attitudes toward television39 , families in America are choosing television 40other passive activities, such as watching movies, playing video games, andsurfing the Web 41regularity that has never happened before. These activities are 42intheir inactivity. Family members——young and old——watch rather than 43 . These passive formsof entertainment 44 , rather than encourage, family 45and community involvement. 查看材料A.allow B.enable C.cause D.require 查看材料A.parents B.members C.seniors D.children 查看材料A.singly B.loosely C.flexibly D.directly 查看材料A.which B.while C.whereas D.wherever 查看材料A.little B.such C.some D.this 查看材料A.or B.and C.thus D.so 查看材料A.enlighten B.entertain C.move D.manage 查看材料A.effectively B.strictly C.unwillingly D.widely 查看材料A.Never B.Hardly C.Seldom D.Often 查看材料A.if B.even if C.so D.so that 查看材料A.however B.instead C.moreover D.therefore 查看材料A.separately B.quietly C.creatively D.actively 查看材料A.Because of B.In place of C.In spite of D.Speaking of 查看材料A.viewing B.educating C.broadcasting D.programming 查看材料A.among B.despite C.and D.as 查看材料A.with B.by C.for D.over 查看材料A.usual B.common C.same D.similar 查看材料A.sleep B.sit C.eat D.do 查看材料A.weaken B.end C.avoid D.worry 查看材料A.building B.interaction C.planning D.reunion
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【单选题】已知某用电设备的阻抗Z=7.07Ω,R=5Ω,则其功率因数为( )。
A.
0.5
B.
0.6
C.
0.707
D.
20
【简答题】已知某用电设备的阻抗|Z|=7.07Ω,R=5Ω,则其功率因数λ为()。 (A) 0.5 (B) 0.6 (C) 0.707 (D) 0.8
【单选题】已知某用电设备的阻抗为|Z|=7.07Ω,R=5Ω,则其功率因数为[ ]。
A.
0.3
B.
0.5
C.
0.6
D.
0.707
【单选题】已知某用电设备的阻抗 , R =5 Ω ,则其功率因数 cos φ 为( )。
A.
0. 5
B.
0.6
C.
0.707
【简答题】已知某用电设备的阻抗为∣Z∣=7.07 Ω ,R=5Ω,则其功率因数为( )。
【简答题】写出湿法灭菌的原理和特点。
【单选题】已知某用电设备的阻抗|Z|=7.07Ω,R=5Ω,则其功率因数λ为( )。
A.
0.5
B.
0.6
C.
0.707
D.
0.8
【单选题】窗体上有一个名称为Command1的命令按钮,其单击事件过程如下: Option Base 1 Private Sub Command1_Click() Dim a(4, 4) As Integer For i = 1 To 4 For j = 1 To 4 a(i, j) = Int(Rnd * 100) Next Next x = a(1, 1) y = a(1, 1) For i = 1 T...
A.
二维数组元素的值是不大于99的随机整数
B.
计算结果x是二维数组各元素中的最大数
C.
计算结果y是二维数组各元素中的最小数
D.
计算结果 s是二维数组各行第一个元素之和
【单选题】女性,35岁,右上腹痛2天,伴恶心呕吐,今起疼痛阵发性加剧,伴畏寒发热,体温38℃,巩膜无黄染,右上腹有压痛,诊断首先考虑
A.
急性阑尾炎
B.
急性胆囊炎
C.
急性胰腺炎
D.
胃十二指肠溃疡
E.
胆总管结石,胆管炎
【单选题】女性,35岁。右上腹痛2天,伴恶心、呕吐,今起疼痛阵发性加剧,伴畏寒,发热。体检:T38℃,巩膜无黄染,右上腹有压痛,诊断首先考虑
A.
急性阑尾炎
B.
急性胆囊炎
C.
急性胰腺炎
D.
胃十二指肠溃疡穿孔
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