My bag is newer than _____.

《解放战争第二年的战略方针》要求：“举行全国性的反攻，即以主力打到外线去，将战争引向国民党区域，在外线大量歼敌。”体现这一战略方针的军事行动是（    ）

在体液免疫中，效应B细胞发挥免疫作用的机制是（  ）

    Last Sunday it was sunny . We went to have a picnic in the park . We took lots of food . Ms Smart went with us . She was a nice teacher . Sam took his football . Amy took her kite . Daming took his book . We played games under a tree . We sang and danced . Then we were hungry and thirsty . We ate many apples . So she had a stomachache. Mr Smart took her to the hospital .