【单选题】沿海地区最常见的能致人类食物中毒的病原菌是:
【单选题】According to the key witness, a peculiarly big nose is the criminal's most memorable facial _____.
【判断题】山西是黄河与长江两大流域的分水岭,被誉为“华北水塔”。
【简答题】Listen to the audio, write down the key words and then retell the sentence according to the key words.