国外有海豹两栖士兵,而我们国内有海陆空全能的三栖士兵。以下哪种技能是三栖士兵不用掌握的?()
A.空中跳伞
B.驾驶飞机
C.深海潜水
D.登陆作战
参考答案:B
Ge You, a famous _______, played a leading role in the film You Are The OneⅡ, which proves to be a great success.
A.clown
B.amateur
C.comedian
D.director
商务合同的保管期限与履行期限密切相关。()