消防呼救器是消防人员进入()随身携带的一种遇险报警和声音联络装置。
(A)火场
(B)地下室
(C)高层建筑
(D)室内
参考答案:A
As it was his first time to visit the science museum, the boy seemed ___about everything there. [ ]
A. anxious
B. curious
C. particular
D. frightened
性传播性疾病的英文缩写字符为:
A.CIN
B.PSTT
C.STD
D.HPV
E.TBS