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【单选题】
西门子数控系统中，R1=1，R2=－2则下列正确的是( )A.
ABS(R1)>ABS(R2)
B.
R1>R2
C.
SIN(R2)>SIN(R1)
D.
LN(R1)>LN(R2)
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【简答题】听录音,判断正误,正确的填V,错误的填F。
【简答题】Humour is their “________”. They do not have to switch it on deliberately, and they cannot switch it off.
【简答题】早发型新生儿败血症的常见致病菌（ ）|晚发型新生儿败血症的常见致病菌（ ）A. GBSB. 葡萄球菌C. 肺炎链球菌D. 李斯特菌E. 大肠杆菌
【单选题】Which of the following statements is NOT true about humour?
A.
English people don’t take pride in their sense of humour.
B.
In English conversation, there is always an undercurrent of humour.
C.
Most English conversations will involve at least some degree of banter, teasing, understatement or self-deprecation.
D.
Humour is their “default mode”.
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