船舶在波浪中的垂荡周期Th:()
A.与船舶的平均吃水d成正比
B.与船舶的平均吃水d成反比
C.与船舶的平均吃水d的平方根成正比
D.与船舶的平均吃水d的平方根成反比
参考答案:C
网箱设置应选择水质条件良好、具有()、避风、向阳、水面宽阔的水域。
There are more people who are obese today than 20 years ago.
A. gainfully employed B. upwardly mobile C. excessively overweight D. privately educated