5.国防是国家为了防备和(),保卫国家主权、统一、领土完整和安全所进行的军事活动。
A.抵抗侵略
B.抵抗进攻
C.制止武装颠覆
D.制止暴乱
查看答案
Most proteins function as
A. enzymes
B. structural proteins
C. hormones
D. neurotransmitters
The milk, cheese & yogurt group are important for
A. strong bones
B. teeth
C. muscles
D. all of the above
Which of the following amino acids doesn’t belong to essential amino acids?
A. Methionine
B. Isoleucine
C. Valine
D. Cysteine
Which type of grain is the healthiest and contains the most natural nutrients?
A. enriched grains
B. refined grains
C. multi-grains
D. whole grains