砖砌体水平灰缝砂浆饱满度应不少于()。
A.50%
B.70%
C.80%
D.100%
参考答案:C
Oh, no! It’s raining. We can’t go skating on the square. ____________!
A.What a shame
B.Well done
C.What a surprise
D.How wonderful
What following is not among the functions of SOLAS ships?()
A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals