干表观密度500kg/m3、强度3.5级的蒸气加压混凝土砌块,可用于()以下、总高度不超过10m的横墙承重房屋。
A.三层
B.四层
C.五层
D.六层
参考答案:A
A () consists of the symbols, characters, and usage roles that permit people to communicate with computer.
A.programming language
B.network
C.keyboard
D.display
《维斯比规则》在哪几个方面对《海牙规则》作了修改?