【多选题】以下______是常见的数据库管理系统。
【单选题】婴幼儿读书写字时光线应该来自身体的( )
【单选题】I needn't have brought so large amount of money. There is nothing worth ______.
【单选题】确诊菌痢的依据,下列哪一项最为重要( )
【单选题】American tobacco companies spend large amount of money on international advertising because ______.
A.
their local market are weakening now
B.
by doing so they can make people trust their products
C.
they can draw the attention of both smokers and non-smokers
D.
Americans are already very familiar with their products
【简答题】以下______是常见的数据库管理系统。A. Access; B. FORTRAN; C. Visual Basic; D. Visual FoxPro;
【单选题】串联电路中的电阻分别是400Ω,3KΩ,4.7KΩ,10KΩ,分布电压最大的电阻是