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【单选题】
万用表电压量程5V是当指针指在()位置时电压值为2.5V。
A.
满量程
B.
1/2量程
C.
2/3量程
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参考答案:
举一反三
【判断题】从调节的角度来看, SPWM 逆变器非常适用于交流变频调速系统。
A.
正确
B.
错误
【单选题】In September1944 he was able to return to his academic duties ,but soon after the war ended he ____ a serious illness and did relatively little research thereafter(从那以后).
A.
was fostered by
B.
was inspired by
C.
was stricken by
D.
was triggered by
【多选题】《药品目录》中,“备注”栏标有“◇”的药品,因其组成和适应症类似而进行了归类,所标注的名称为一类药品的统称。以下属于凡例中归类的有()
A.
抗生素
B.
活血化瘀药物
C.
缓解消化道不适症状的复方OTC制剂
D.
缓解感冒症状的复方OTC制剂
【简答题】In September 1944 he was able to return to his academic duties, but soon after the war ended he ____(患上了)a serious illness and did relatively little research thereafter .
【多选题】活血化瘀类方剂有?
A.
养血返精丸
B.
琥珀散
C.
生化汤
D.
丹参饮
【单选题】In September 1944 he was able to return to his academic duties, but soon after the war ended he _____ a serious illness and did relatively little research thereafter.
A.
be stricken by
B.
been stricken by
C.
being stricken by
D.
was stricken by
【简答题】In September 1944 he was able to return to his academic duties, but soon after the war ended he ( ) a serious illness and did relatively little research thereafter ( 从那以后 ).
【单选题】distinct [dis5tiNkt]
A.
adj. 清楚的, 明显的, 截然不同的, 独特的
B.
n. 区别, 差别, 级别, 特性, 声望, 显赫
C.
v. 区别, 辨别
D.
adj. 卓著的, 著名的, 高贵的
【简答题】In September 1944 he was able to return to his academic duties, but soon after the war ended he _____ a serious illness and did relatively little research thereafter.
【简答题】图示钢杆承受P= 120 kN的轴向拉力,若用于制造钢杆的板材厚度为20mm,许用拉应力[σ]= 175 MPa,许用切应力[τ]= 100 MPa,许用挤压应力[σb]= 350 MPa,若螺钉材料与钢杆材料相同;试求钢杆端部的尺寸b。 【图片】【图片】
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