【单选题】水泥砼面层横向缩缝顶部锯切成槽口的深度为面层厚度的( ),宽度3~8mm,槽内填塞填缝料。
【单选题】若 是某个二阶线性齐次方程的不相同的解,则以下说法中正确的是
【单选题】水泥砼面层横向缩缝顶部锯切成槽口的深度为面层厚度的1/5~1/4,宽度( )mm,槽内填塞填缝料。
【判断题】TV and obesity always go hand in hand because TV takes the place of playing outside or other kinds of exercise.
【多选题】An absolutely integrable signal x(t) is known to have a pole at s = 2. Which are right in following statements.
A.
x(t) may be finite duration
B.
x(t) may be left sided
C.
x(t) may be right sided
【判断题】Even if the receiver is known to the writer personally, a formal greeting such as “Dear Sir(s)” or “Dear Madam(s)” is used.