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【单选题】
在天测罗经差中，当被测天体的高度一定时，罗经面的倾斜角越（），观测天体罗方位的误差越（）。（）Ⅰ、大/小；Ⅱ、小/大；Ⅲ、小/小A.
Ⅰ
B.
Ⅱ
C.
Ⅲ
D.
Ⅰ或Ⅱ
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举一反三
【简答题】Use the node-voltage method to find the voltage vo in the circuit shown. Refer to Section 3.4 on page 65 of Nelsson's book to see how to deal with a problem like this.
【单选题】下列描述体现了哪种类型组织购买品产品线的特征，不是实际的产品，购买者所购买的是一个公司维修、技术服务或管理咨询等方面的能力()
A.
专有产品或目录产品
B.
按订货制造的产品
C.
专门设计的产品
D.
工业品服务
【简答题】已知力F沿直线AB作用，其中一个分力的作用线与AB成45°角，若欲使另一个分力的大小在所有分力中为最小，则此二力间的夹角为 °。
【单选题】Refer to Figure 12. The circuit is used to derive a 60 Hz reference for a digital clock. After running for 24 hours the clock appears to be running 2 minutes and 18 seconds slow. What appears to be wr...
A.
The error is very small and is to be expected of a circuit of this type; the clock should be regularly reset.
B.
The modulus of the counter has decreased, causing the counter to produce a lower output reference signal for the clock.
C.
The modulus of the counter has increased, causing a drop in the output frequency of the counter.
D.
The XTAL OSC is probably cooling off too much at night and consequently slowing down;the XTAL OSC should be temperature compensated.
【单选题】Refer to the circuit and waveforms in Figure 8-2. What value is stored in the register at the end of the fourth clock cycle?
A.
1 0 1 0
B.
0 1 1 0
C.
0 1 0 1
D.
0 0 0 0
【单选题】已知力F沿直线AB作用，其中一个分力的作用线与AB成45°角，若欲使另一个分力的大小在所有分力中为最小，则此二力间的夹角为（ ）°。
A.
45
B.
90
C.
180
D.
0
【单选题】Refer to the circuit and waveforms in Figure 8-2. What value is stored in the register at time 'X'?
A.
0 1 0 1
B.
1 1 1 0
C.
0 1 1 1
D.
0 1 1 0
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