Tìm y:

72 : y = 8

5 ´ y = 375

y + 158 = 261

y : 5 =141

It rains heavily, ........................................ I can't go to the movies with you.

A. and

B. but

C. because

D. so

Trong Pascal, khai báo nào sau đây đúng:

A. Program Giai PTB2;

B. Uses : crt;

C. Var a, b, c: real;

D. Const pi = 3,14;

Căn cứ vào Atlat Địa lí Việt Nam trang 17, các trung tâm kinh tế ở nước ta xếp theo thứ tự giảm dần về quy mô lần lượt là

A. Hà Nội, Huế, Biên Hòa, Hạ Long

B. Hà Nội, Biên Hòa, Huế, Hạ Long.

C. Hà Nội, Biên Hòa, Hạ Long, Huế.

D. Hà Nội, Hạ Long, Huế, Biên Hòa.

Khi chuẩn bị ao nuôi cá, người ta lấy nước vào ao mấy lần?

A. 1

B. 2

C. 3

D. 4

Read the following passage carefully and then choose the best option to fit each space. Identify your choice by circling letter A, B, C or D on the answer sheet.

          The 18^th-century battlefield was, compared with that of the 20^`th-century, an intimate theatre, especially intimate in the (19)___ of the Revolution, which was usually small even by the standards of the day. Soldiers had to come to close quarters to kill; this fact reduced the mystery of the battle, though perhaps not its terrors. But at least the battle field lost some of its impersonality. In fact, in (20)___  to (with) the 20^1h-century combat, in which the enemy usually remains unseen and the source of incoming fire unknown, in the 18^1h-century battles the enemy could be seen and sometimes even (21)___ . (22)____ one's enemy may have arose a singular (23) ____of feeling uncommon in modern battles. Before the (24)___ occurred tension and anxiety (25) _____ up as the troops marched from their column into a line of attack. The ( 26) ____ of their movements was well understood by themselves and their enemies, who must have watched with feeling of dread and fascination. When the order came sending them (27) ____ rages, even madness replaced the attacker's (28) ____, while terror and desperation filled those who received  the charge.

Điền vào số (22)

A. Seeing              

B. Dealing            

C. Fighting           

D. Killing

Cho 18,5 gam chất hữu cơ A (có công thức phân tử C₃H₁₁N₃O₆) tác dụng vừa đủ với 300 ml dung dịch NaOH 1M tạo thành nước, 1 chất hữu cơ đa chức bậc I và m gam hỗn hợp muối vô cơ. Giá trị gần đúng nhất của m là

A. 19,05.                 

B. 25,45.              

C. 21,15

D. 8,45

NaCl, HCl , Na2SO4, Ba(NO3)2

|+ quỳ tím

_đỏ_______o đổi màu quỳ tím ____

HCl ..NaCl , Na2SO4, Ba(NO3)2

| + AgCl

__có | trắng(NaCL, Na2SO4)________không hiện tượng_(Ba(NO3)2)____

NAHSO3

Mẫu nguyên tử Bo khác mẫu nguyên tử Rơ – đơ – pho ở điểm nào?