【单选题】防火墙是保证内部计算机网络安全的一道重要屏障,根据其特性要求,()不属于防火墙的主要功能。
【单选题】胃的下口称为(),即胃的出口,与十二指肠相接。
【单选题】According to Verity, why is the toothpaste never green?
A.
Because green products are regarded to be a bit disgusting.
B.
Because green products are hard to be recognized.
C.
Because green products are not respected by most people.
D.
Because green products are not designed by color industries.
【判断题】Never regard a public speaking as an assignment.
【单选题】This year we'll produce ______ cotton as we did last year.
【简答题】农业设施有很多类型,按栋数分类有()和()温室;按温室栽培作物的作用不同分为()、观赏展览温室、()、专用温室。 2、 现代温室的配套设备主要有自然通风系统、加热系统、幕帘系统、()、()、补气系统、计算机自动控制系统、灌溉系统、()。 3、 植物工厂的主要类型包括()、()。