TB/T2340-2000标准规定:70°探头探测WGT-3试块上Φ3×15横通孔,当波高达到80%时的灵敏度余量不小于()dB。
参考答案:40
TB/T2340-2000标准规定:70°探头探测WGT-3试块上Φ3×15横通孔,当波高达到80%时的灵敏度余量不小于()dB。
参考答案:40
完形填空。 | |||
It was my birthday last Thursday. I decided to __1__ by inviting a few friends out to supper. I chose a restaurant in a __2__ part of town. It is one of my favorite restaurants because the food is good and the waiters are friendly. It is __3__ ever crowded, because not many people know abo5ut it, so it is not usually | |||
( )1. A. remember | B. celebrate B. calm B. often B. possible B. as a matter of fact B. full B. a B. Luckily B. leave B. find out B. beside B. bill B. Fortunately B. which B. was busy with B. tired B. food B. good news B. Seeing B. no meat and fish | C. memorize | D. congratulate |