振动式密度计按用途可分为振动式气体密度计和振动式液体密度计。
参考答案：对
---What do you think of the film called So Young?
--- I think this is the most wonderful film _______ I have ever seen.
A．that
B．who
C．whom
D．what
体积最大、数目最少的 * * 是（）
A.丝状 * *
B.菌状 * *
C.轮廓 * *
D.叶状 * *
E.以上都不是
