单项选择题

Low-paying jobs are __________ but it's hard to find a good one.
A、 a dime a dozen
B、 a dime and dozen
C、 a dime and dozens
D、 dimes and dozens

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下列关于地基处理土的力学特征不正确的是（）

A．压缩性低
B．抗剪强度低
C．渗透性小
D．结构性强

单项选择题

In a non-inverting amplifier circuit, if the op-amp has an open-loop gain of 200000, the input voltage Vin = 1.5 volts, the inverting input resistor R1=10 kilo-ohms，the feedback resistor R2=0 ohms, then the output voltage can be calculated by using the formula. The output voltage Vout = ( ) volts. A.
300000 B.
0 C.
1.5 D.
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