VHF船舶间航行安全通信使用.()
A: CH60
B: CH13
C: CH16
D: CH8
A: CH60
B: CH13
C: CH16
D: CH8
举一反三
- ________被指定为VHF无线电话国际遇险与安全通信频道,俗称公共频道。 A: CH 16 B: CH 06 C: CH 10 D: CH 72
- 按要求安装有VHF无线电装置的船舶,站应在()保持连续值守。 A: CH 60 B: CH 70 C: CH D: CH71
- 152. The "scan" function of VHF receiver is used to . A: monitor Ch 16 continuously and switching to either Ch 70 0r Ch 13 every 5 seconds B: scan Ch 16 for distress calls C: scan Ch 70 for distress alerts D: sequentially scan all or selected channels
- 在紫外可见光区有吸收的化合物() A: CH—CH—CH B: CH—CHOH C: CH=CH—CH—CH=CH D: CH—CH=CH=CH—CH
- 下面判断ch是大写或者小写英文字母的表达式哪个正确? A: ch >= 'A' && ch <= 'Z' || ch >= 'a' && ch <= 'z' B: ch >= A && ch <= Z || ch >= a && ch <= z C: 'A' <= ch <= 'Z' || 'a' <= ch <= 'z' D: A <= ch <= Z || a <= ch <= z