女性，60岁，足癣20年，反复发作，小腿红肿疼痛，寒战发热。可能的诊断为 A．下肢静

— I don’t understand why you didn’t go to the lecture yesterday afternoon.

—I’m so sorry. But I _________ my homework.

A．had done

B．was doing

C．would do

D．am doing

_________was the story the boy told the reporter.

A．What

B．All that

C．Such

D．So

在下列程序的空白处，应填入的正确选项是( )。
Import java.io.*;
Pulilc class ObjectStreamTest
Publilc static void main(string args[])throws IOException
ObjectoutputStream oos=new ObjectOutputStream
(new FileOutputStream("serial.bin"));
Java.util.Date d=new Java.util.Date();
Oos______(d);
ObjectInputStream ois=
new ObjectInputStream(new FileOutputStream("serial.bin"));
try
java.util.date restoredDate=
(Java.util.Date)ois.readObject();
System.out.println
("read object back from serial.bin file:"
+restoredDate);

Catch(ClassNotFoundException cnf)
System.out.println("class not found");

A．WriterOhject

B．Writer

C．BufferedWriter

D．writerObject

下列辨别伪劣食品的做法正确的是？（）

A、提防颜色过分艳丽的食品

B、提防呈不正常白色的食品

C、提防反自然生长的食品

D、以上皆是

马赫数